NI FP-AO-C420 FieldPoint Terminal Module

The NI FP-AO-C420 is a FieldPoint analog output module that delivers two channels of isolated 4–20 mA current output for industrial control applications. Each channel provides 12-bit resolution with 500 μs step response time, making it suitable for precise actuation and device control in harsh environments. The module mounts directly to an FP-TB-10 terminal base and operates reliably across -40 to 70 °C, drawing 1100 mW from the host system.

– Technical Specifications

• Output Type: Analog current output
• Output Channels: 2 (isolated)
• Output Range: 4 to 20 mA
• Resolution: 12-bit
• Maximum Current Drive: 20 mA
• Maximum Load Impedance: 500 Ω
• Step Response Time: 500 μs
• Operating Power: 1100 mW
• Operating Temperature: -40 to 70 °C
• Field Wiring: 24 to 12 AWG; screw terminal torque 0.5–0.6 N m (4.4–5.3 lb in.)

– Key Features

• Channel-to-channel isolation for independent control paths
• Internal loop power supply capable of driving 500 Ω loads
• 12-bit resolution delivers 0.098 mA steps across the 4–20 mA range
• Fast 500 μs settling ensures responsive closed-loop control
• Screw terminal connectivity accommodates industrial wiring standards

– Typical Applications

• Proportional valve and actuator control
• Transmitter excitation and field device operation
• Process control loops requiring isolated current outputs
• Industrial automation systems in temperature-variable environments

– Compatibility & Integration

The FP-AO-C420 integrates into the National Instruments FieldPoint modular I/O system. Mount up to six dual-channel modules on a single FP-TB-10 terminal base. Network-based configuration and real-time access are enabled through FieldPoint network modules, allowing distributed measurement and control across industrial facilities.